Stump-extractor



J. HAMLYN.

STUMP EXTBAOTOR.

No. 28,856. Patented June26, 1860.

Q- r 1g Q Q Q 9%- a UNITED STATES PATENT OFFICE. A

JOHN HAMLYN, OF BELLEVUE, MICHIGAN.

STUMP-EXTRACTOR.

Specification of Letters Patent No. 28,856, dated June 26, 1860.

To all whom it may concern:

- Be it known that I, JOHN HAMLYN, of Bellevue, in the county of Eaton and State of Michigan, have invented a new and useful Improvement in Stump-Machines; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which Figure 1 is a perspective view, Fig. :2 is a detached vertical section.

Similar letters indicate corresponding parts in both of the figures.

The framing to which the main operating parts of this machine are connected consists of a platform A, standard B, and a bracket C, all of which may be constructed of hard wood planking framed together in a substantial manner.

D represents a cast iron bed plate which is bolted to the upper side of the platform A in a suitable position.

E is a stout perpendicular bar of iron, which works freely up and down in two bearings, one of which is formed in the bracket C, and the other is in the center of the bed plate D. This bar is perforated with a series of holes, h, h, h &c. at proper distances apart for the purpose of receiving two catch pins 39, p and it is provided at its upper end (which is forked) with a roller F, which revolves on a strong pin or journal 6 inserted through the forks.

L represents the prime working lever, inserted into a socket formed in the edge of the cast iron disk G. The disk G is fitted so as to work freely around the bar E, and it has a fullness or projection on each opposite side, in which are formed or placed two sockets, for the reception of the upper ends of two toggle bars T, T; the sockets for the lower ends being in the bed plate D. Above the disk G, and so as to work freely also on the bar E, another disk or collar H is placed, and to reduce friction, conical shaped rollers are interposed as indicated at c, c, o &'c. between their contiguous faces, which are properly beveled, and the rollers are confined in place by a flange extending around the periphery of one or both of the disks.

I represents a wooden pedestal, with a rack bar J, attached to its upper end. It is placed on the opposite side of the stump,

from the machine, and merely acts as a fulcrum for the. short leg of an auxiliary lever L This lever is placed horizontally over the stump, with one end adjusted to a suitable height, by a pin in the rack bar J, or in any other suitable manner, while the other end rests on the upper side of the roller F, of the lifting bar E.

The operation of this machine is as follows: The lifting apparatus being adjusted properly, on one side of a stump, and the fulcrum or pedestal on the other, the lever L is next placed in the position as described, and a chain which is linked to an adjustable clevis K, is fastened as snugly as possible to the stump. The lever L is now pulled around, either by hand, or otherwise, which turns the disk G, and carries the movable ends of the toggle bars T T from an oblique to a perpendicular position. This movement, through the intervention of the catch pin 1) lifts the bar E and lever L a very little more than the distance from center to center of the holes in the bar, and will probably only have the effect of making the chain taut. The pin p is now placed in the next hole below, and the lever L is reversed to its former position, when the weight of the disks and rollers, causes them to descend with the toggles; the pin 29 is next placed in the adjacent hole, and the whole operation repeated until the stump is torn from its bed. The fulcrum may be raised at any time when necessary, by a pin in the rack J, or by the insertion of washers under the end of the lever, or in any other convenient way.

I do not wish to confine myself either to the use of the roller F, as a compensation for the vibration of the lever, as there are other devices that would answer the same purpose equally well. Neither do I wish to confine myself to the use of a single arrangement of toggles operating in the manner described on one side only of a stump; as it is evident that the same arrangement can be used to great advantage, when occasion requires, on the opposite side also, in place of the pedestal I, and operated together either simultaneously or alternately.

I do not claim as new the use of toggles in connection with a rack, for lifting purposes generally, nor do I claim of itself, the arrangement of antifriction rollers c, a, 0

&c., as that forms part of acombination patented by Jay H. Brown, for another and distinct purpose; but

What I do claim and desire to secure by 5 Letters Patent, is

The application and use of the Within described arrangement of toggle bars T, T, disks G and H, rollers 0, 0, 0 &c., rack bar E,

and catch pins 32', W, in combination with an auxlhary lever L substantially in the 10 manner and for the purposes herein described and set forth.

JOHN HAMLYN. Witnesses:

FRANCIS W. SHEARMAN, GEORGE JOHNSON. 

